Harrow attachment for cultivators



Dec. l3, 1927.

R. H. KIPP HARROW ATTACHMENT FOR CULTIVATORS Filed May 5. 1926 Patented Dec. 13, 1927. V i 1 UNITED 1 STATES PATENT, OFFICE.

I nor H. K ra,v or

CHICAGO, ILLINOIS, assrsnon TO 'InrnRNATIor-IaL nenvnsrrnn COMPANY, A CORPORATION or'nnw JERSEY.

' HARRQW ATTACHMENT FOR GULTIVATOI ES.

Application filed May 3,

This invention relates'to cult-ivators and is more particularly concerned with cultiva-- which'tend to displace and loosen such teeth.

" It is also an object of the invention to provide a harrowattachment of novel construcsidesof the harrow teeth by means of tension tion for promoting economy in manufacture and savings of time and labor in the use of harrow attachments.

For accomplishing these objects and others, which will hereafter appear, the in vention contemplates a structure illustrated in the accompanying drawings, in which:

Figure 1 is a plan of the illustrative cultivator having the harro-w attachment applied thereto; V v

Figure 2 is an elevation of the harrow attachment; i l

Figure 3 is a detail view, partly in elevation' and partly in section, taken on the line 33 of Figure 4, and showing the manner of clamping the harrow teeth} I Figure 4 is substantially a plan view taken on, the line 'L1'4: of Figure 2 showing the relationships of the tooth clamping bars.

the harrow teeth, the draft coupling, and adjusting device for varying the. angleof cultivation. i p i I The illustrative harrow attachment comprises the channel bar 1' having upper and lower-parallel flanges 2 and 3. These flanges areconnected by the tooth engaging web 4; having a width insubstantial excess of the height of the flanges to afford advantageous support forgthe harrow teeth 5. For insuring the-desired spacing of the .harrow teeth andfor adequatelysupporting them against displacement in service, the flanges of the channel bar are formed with notches'G, which snugly receive-the harroW teeth. Channel bars having relatively low fianges' permit the advantageous use of a forging operation for forming the notches,

portions'of the flanges'being upset so asto form substantial lateral extensions 7 of the web of the channel, by this operation. These extensions of the web together with the intervening portions of the web provide wide bearing surfaces in engagement with the barrow teeth for effectively bracing the lat;

1926. 's m1 No. 106,187.

ter and preventing displacement by the shocksjand, twisting strains to which the harrow teeth are'subjected.

- Twisting strains tending to displace the harrow teeth along the channel bar are resisted at comparatively widely spaced points by reason of the width of the channel bar and the consequent wide spacing of the notches. r

A n auxiliary clamp bar "8, parallel to the channel bar, is clamped against the opposite bolts 23. passing transversely through the parallel bars. i

a The above described part of the illustrative structure is herein considered as a toothed unit and wi'll'be refe red to as such.

As this unit is intended to have its teeth .penetrate the ground toa substantial ex- ,tent as-the cultivatortraverses a field, it I must bear the brunt of such severejshocks as occur when the teeth strike obstructions suchas stones, roots, etc., as well as the strains of ordinary service. ,It is, therefore, important that the tooth unitbe adequately and solidly supported with its teeth in substantially vertical positions. To this end, 'a substantiallyconstructed adjusting mechanism is secured to the tooth unit. This mechanism includes a primary clamp member 9 shown bolted to the auxiliary clamp bar 8. This .member has a central portion ofsubstantially circular design. and

relatively large proportions so as to afford an effective. bearing? surface of relatively The, central p art reat- WlCltlL. j i

of the clamp member 9 .is formed on one side with upstanding strengthening' ribs 10 which have parallel portions 11 forming, in effect, a groove in; the clamp. member for snugly receiving the auxiliary clamp bar 8. For additionally preventing relativeinovements between the clamp member and the bar 8 and for fur ther strengthening the connection between them, the former has diametrically opposed v large diameter. This secondary member is termed with vertical ribs for rigiditying the construction and yueventing twisting of the tooth unit relative to a coupling herein shown as a twisted bar '16, having its lower end secured between the ribs 15 for supporting and bearing the entire draft of the tooth unit. A. central securing bolt 17 passes through the coupling, the clamp members and the tooth clamping bars for maintaining the entire assembly in rigid condition.

The coupling 16 is formed preferably of standard flat bar stool; similar in shape to that used in making cultivatorstandards. Intermediate its ends it isbent at right angles and twisted so that the tooth unit is presented at an effective angle to the line of draft.

The use of a single coupling for each tooth unit promotes economy of manufacture and enhances the effective operation of the harrow attachment. When the operator desires to adapt the attachment for the cultivation of ground which is thrown u) or billed about plants, he has but to malte a single adjustment, loosening the bolt, 17, moving the tooth unit, and then tightening the bolt. The liability of clogging of the barrow attachment by Weeds is also materially reduced by the employment of a single coupling. The upper and forward end of the coupling is rigidly secured to an attachment lug extending rearvvardly from a cross-head 18 attached to the rear end of a cultivator beam 19. The illustrative crosshead is pivotally attached to the bcam and is held in proper transverse position by a link QOpivoted to the cross-head and extending forwardly substantially parallel to the cultivator beam. The link and beam are pivoted at their forwardends to the frame of a cultivator comprising the cranked axles 21, connected by the tongue 22 and supported by the "Wheels 23. p y

Having described my invention, I claim:

1; In a barrow attachment for cultivator-s, a plurality of barrow teeth, two parallel bars having the harrow teeth clamped thercbetween, and securing devices extending through said bars at intervals for pressing the bars upon the harroiv teeth, one of said bars being a channel bar having its flanges upset at intervals so that the upset portions form lateral extensions in substantial alinement with the web of the channel bar leaving adjacent notches in the flanges for receiving and holding the harrow teeth.

2. A harrow attachment for cultivators comprising a series of barrow teeth, parallelclamping bars for holding said teeth therebctween in spaced parallel relationship, one of said clamping bars being constructed of channel iron formed at intervals to present widened bearing surfaces for the burrow teeth, the widened bearing surfaces co1nprising portions of the web of the channel bar together with extensions forged from the flanges of the channel bar, vertically alined notches formed in the flanges of the channel bar in alinement with said extensions, and a coupling bar secured to the parallel clamping bars for holding the harrow attachment in operative position upon the cultivator.

3. A cultivator comprising parallel cultivator beams, crossheads pivotally mounted on the free ends of the beams, a coupling bar centrally secured to each crosshead and extending rearwardly and downwardly therefrom, a primary clamp member secured to the lower end of the coupling bar, asecondary clamp member in contact with thepri-i mar-y clamp member and adjustably secured thereto, a barrow attachment secured to the secondary clamp member, said barrow at tacln'nent including a bar seated in a groove in the secondary clamp member, a11daparallel channel bar between which and said first bar barrow teeth are held, said channel bar having its flanges upset at intervals to form seats for maintaining said barrow teeth cnrely in their operative positions.

4. A harrow attachment for cultivators comprising a channel bar, said channel bar having its flanges pressed out and upset at intervals to form together with portions of the Web of the channel bar surfaces for harrow teeth, thechannel bar being also provided with vertically alinednotches at the positions where the flanges are upset,a complementary clamping bar parallel to the channel bar and spaced therefrom, thehar row teeth tightly fitting within. said notches and bearing against extensions of the web of the channel bair formed by the upsetting of the flanges, bolts extending through the channel bar and the clamping bar for tightly pressing said bars against the harrow teeth, and a coupling bar adjustably secured to the clamping bar intermediate its ends for supporting the barrow attachment in oper tive position upon a cultivator.

In'testimony whereof I affix my signature.

nov ii. men. 

